Your AI said "fixed" but never ran the tests? I made a plugin that won't let it say "done" until they pass

You ask Claude Code, Codex, Cursor, etc. for a quick fix. It changes the code and says "Fixed ✅". Later you find out it never ran a single test, or ran them through | tail and missed 58 failures.

So I built proof-of-done, a free Claude Code plugin: Claude simply can't finish until the tests, build or lint have passed after its last edit.

Try it inside Claude Code (free, source on GitHub ):

/plugin marketplace add WST2002/claude-code-skills /plugin install proof-of-done@claude-code-skills Enter fullscreen mode Exit fullscreen mode

A real Claude Code session, shortened: Claude said "fixed" without testing, the plugin made it run the tests, and they found a second bug.

1. It watches every edit and every check

2. When Claude tries to stop, it asks: is there proof?

5. New code with no test? It asks you once

Has your AI ever told you "done" when it wasn't? What did it skip?